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Codec: avc1.420c15

4.02% Encoder Support
12,903 of 320,654 sessions supported encoding
99.94% Decoder Support
269,575 of 269,750 sessions supported decoding

Codec Specifications

Codec Family AVC (H.264)
Profile Baseline
Level 2.1
Maximum Resolution SD (512×480)
Maximum Bitrate 4 Mbps

VideoEncoder Support Matrix

Browser × Platform encoder support from 320,654 test sessions. Browser detection based on user agent strings.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 0.03% 41 / 143,969 0.18% 36 / 19,754 — 0.13% 82 / 64,010 0.91% 71 / 7,840
SafariSafari
 — 2.0% 169 / 8,446 1.43% 446 / 31,147 — —
EdgeEdge
 0.03% 9 / 30,891 0.0% 0 / 351 — 0.0% 0 / 964 0.0% 0 / 54
FirefoxFirefox
 96.06% 9,424 / 9,811 99.92% 1,314 / 1,315 — 0.0% 0 / 36 98.16% 1,282 / 1,306

VideoDecoder Support Matrix

Browser × Platform decoder support from 269,750 test sessions. Decoder data collection started Jan 2026.

Browser Windows Windows macOS macOS iOS iOS Android Android Linux Linux
ChromeChrome/Chromium
 99.98% 121,554 / 121,581 99.89% 16,111 / 16,129 — 99.99% 54,020 / 54,028 99.13% 6,593 / 6,651
SafariSafari
 — 99.9% 7,061 / 7,068 99.98% 25,578 / 25,584 — —
EdgeEdge
 100.0% 26,863 / 26,864 100.0% 323 / 323 — 100.0% 890 / 890 100.0% 50 / 50
FirefoxFirefox
 99.99% 8,055 / 8,056 100.0% 1,074 / 1,074 — 0.0% 0 / 27 99.15% 1,052 / 1,061